Dictionary![]() ![]() por•talPronunciation: (pôr'tl, pōr'-), [key] —n. 1. a door, gate, or entrance, esp. one of imposing appearance, as to a palace. 2. an iron or steel bent for bracing a framed structure, having curved braces between the vertical members and a horizontal member at the top. 3. an entrance to a tunnel or mine. por•talPronunciation: (pôr'tl, pōr'-), [key] Anat. —adj. noting or pertaining to the transverse fissure of the liver. —n. See portal vein. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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